Remove static fields tests

Static fields were broken up from instance fields and demoted to
Stage 2 in the November 2017 TC39 meeting. This patch removes the
test262 tests which test static class fields.

test/language/statements/class/static-classelementname-abrupt-completion.js

-// Copyright (C) 2017 Valerie Young. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-description: Class definition should error if evaluation of static ClassElementName errors
-esid: runtime-semantics-class-definition-evaluation
-info: |
-  Runtime Semantics: ClassDefinitionEvaluation
-  ...
-  27. For each ClassElement e in order from elements
-    a. If IsStatic of e is false, then
-        i. Let fields be the result of performing ClassElementEvaluation for e with arguments proto and false.
-    b. Else,
-        i. Let fields be the result of performing ClassElementEvaluation for e with arguments F and false.
-    c. If fields is an abrupt completion, then
-        i. Set the running execution context's LexicalEnvironment to lex.
-        ii. Set the running execution context's PrivateNameEnvironment to outerPrivateEnvironment.
-        iii. Return Completion(status).
-
-  Runtime Semantics: ClassElementEvaluation
-  ...
-    ClassElement : static FieldDefinition ;
-      1. Return ClassFieldDefinitionEvaluation of FieldDefinition with parameter true and object.
-
-  Runtime Semantics: ClassFieldDefinitionEvaluation
-  With parameters isStatic and homeObject.
-    FieldDefinition : ClassElementNameInitializer
-      1. Let fieldName be the result of evaluating ClassElementName.
-      2. ReturnIfAbrupt(fieldName).
-
-features: [class, class-fields-public]
----*/
-
-function f() {
-  throw new Test262Error();
-}
-
-assert.throws(Test262Error, function() {
-  class C {
-    static [f()]
-  }
-});

test/language/statements/class/static-fielddefinition-initializer-abrupt-completion.js

-// Copyright (C) 2017 Valerie Young. All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-description: Class construction should error if evaluation of static field initializer errors
-esid: runtime-semantics-class-definition-evaluation
-info: |
-  Runtime Semantics: ClassDefinitionEvaluation
-  ...
-  33. Let result be InitializeStaticFields(F).
-  34. If result is an abrupt completion, then
-    a. Set the running execution context's LexicalEnvironment to lex.
-    b. Return Completion(result).
-
-  InitializeStaticFields(F)
-    1. Assert: Type(F) is Object.
-    2. Assert: F is an ECMAScript function object.
-    3. Let fieldRecords be the value of F's [[Fields]] internal slot.
-    4. For each item fieldRecord in order from fieldRecords,
-      a. If fieldRecord.[[static]] is true, then
-        i. Perform ? DefineField(F, fieldRecord).
-
-  DefineField(receiver, fieldRecord)
-    1. Assert: Type(receiver) is Object.
-    2. Assert: fieldRecord is a Record as created by ClassFieldDefinitionEvaluation.
-    3. Let fieldName be fieldRecord.[[Name]].
-    4. Let initializer be fieldRecord.[[Initializer]].
-    5. If initializer is not empty, then
-        a. Let initValue be ? Call(initializer, receiver).
-
-features: [class, class-fields-public]
----*/
-
-function f() {
-  throw new Test262Error();
-}
-
-assert.throws(Test262Error, function() {
-  class C {
-    static x = f();
-  }
-})